<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01_CSS的三种位置</title>
    <style>
      h4{
        background-color: yellow;
      }
      div{
        color: green;
      }
      h1{
        color: green;
      }
    </style>
    <link rel="stylesheet" href="01.css">
</head>
<body>
<h1 style="color: red;background-color: yellow;">测试优先级</h1>
<h4 style="color: blue">我是标题</h4>
<h4>我是标题</h4>
<hr>
<p>我是段落</p>
<p>我是段落</p>
<p>我是段落</p>
<p>我是段落</p>
<hr>
<div>我是块级元素</div>
<div>我是块级元素</div>
<div>我是块级元素</div>
<div>我是块级元素</div>
</body>
</html>